User blog comment:Anobi/Alternate Timeline Theory/@comment-2068382-20120729001854/@comment-1164563-20120729185146

Even if it is a limitation imposed by the medium itself, it is still fun to trying to fit it in. :D Although sometimes it is more like trying to fit a square plug into a round socket...

According to Devil's Lair summary of DMC4:DF, Volume 2 point 12: "Dante used Dreadnaught against the Savior's mega beam attack because he thought he wouldn't be in time to evade it." It seems like he uses it willingly - at least Dreadnought. Maybe he eventually learned how to do Majin at any time though...